261413151 has 4 divisors (see below), whose sum is σ = 348550872. Its totient is φ = 174275432.

The previous prime is 261413123. The next prime is 261413167. The reversal of 261413151 is 151314162.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261413151 - 2⁷ = 261413023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261413851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43568856 + ... + 43568861.

It is an arithmetic number, because the mean of its divisors is an integer number (87137718).

Almost surely, 2^261413151 is an apocalyptic number.

261413151 is a deficient number, since it is larger than the sum of its proper divisors (87137721).

261413151 is an equidigital number, since it uses as much as digits as its factorization.

261413151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87137720.

The product of its digits is 720, while the sum is 24.

The square root of 261413151 is about 16168.2760676579. The cubic root of 261413151 is about 639.4046799736.

It can be divided in two parts, 26141 and 3151, that added together give a palindrome (29292).

The spelling of 261413151 in words is "two hundred sixty-one million, four hundred thirteen thousand, one hundred fifty-one".